Re: LZ: Compression and patents
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Re: LZ: Compression and patents
On Wed, 11 Sep 1996, barrym wrote:
> > I believe that LZW is no longer patented. I think Microsoft actually uses
> > it in the real-time compression interface in DOS 6 and later.
> > Arithmetic, however, I *know* is still patented--which is why the MRCI
> > doesn't use it, even though it is a better algorithm.
> > BTW--no algorithm works very well for code. I'd say 20 percent compression
> > would be very good. This means that this whole project might not have much
> > in the way of usable results! However, you might prove me wrong--I'd love
> > to see it. Plus, it would be a great learning experience!
> I just went to my util directory, since it contains lots and lots
> of small program files, and used pkzip to compress all the files
> that began with F, then took an average on the compression. It
> was 41%. That means they were now 41% their former size, or they
> were reduced by 59%.
I posted before that a zip of 167 .85s files (The exact stuff on the calc
almost) got a compression ration of 46%. That's REALLY good, but I don't know
if ZCompress will equal zip.
The nice thing about Windows is that it does
Tony Lieuallen not just crash... It displays a dialog
marvin@mars.superlink.net box and lets you press 'OK' first.
http://mars.superlink.net/marvin/home
http://www.geocities.com/SiliconValley/Park/1171/
References: